US6505850B2 - Airbag covering cap comprising a support layer and a cover layer of different elasticities - Google Patents

Airbag covering cap comprising a support layer and a cover layer of different elasticities Download PDF

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Publication number
US6505850B2
US6505850B2 US09/403,471 US40347199A US6505850B2 US 6505850 B2 US6505850 B2 US 6505850B2 US 40347199 A US40347199 A US 40347199A US 6505850 B2 US6505850 B2 US 6505850B2
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United States
Prior art keywords
support layer
tear line
support
cover layer
section
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/403,471
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English (en)
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US20020024199A1 (en
Inventor
Rudolf Helfrich
Norbert Vath
Thomas Klein
Bernhard Kress
Norbert Wolleb
Tomás Sieira
Hans Martin Hauck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takata Petri AG
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Takata Petri AG
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Filing date
Publication date
Application filed by Takata Petri AG filed Critical Takata Petri AG
Assigned to PETRI AG reassignment PETRI AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAUCK, HANS MARTIN, KRESS, BERNHARD, HELFRICH, RUDOLF, WOLLEB, NORBERT, SIEIRA, TOMAS, VATH, NORBERT, KLEIN, THOMAS
Publication of US20020024199A1 publication Critical patent/US20020024199A1/en
Assigned to TAKATA-PETRI GA reassignment TAKATA-PETRI GA CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: PETRI AG
Application granted granted Critical
Publication of US6505850B2 publication Critical patent/US6505850B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/215—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member
    • B60R21/2165—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components characterised by the covers for the inflatable member characterised by a tear line for defining a deployment opening
    • B60R21/21656—Steering wheel covers or similar cup-shaped covers

Definitions

  • the invention relates to an airbag covering cap comprising a support layer and cover layer of different elasticities.
  • an airbag cover which consists of a molded part as the support layer and a visible covering which covers the molded part to form the cover layer.
  • the cover layer is formed as a leather coating with a groove-like partial reduction in the material thickness into which the support layer is stretched.
  • an ideal break point is formed in the support layer and the path of the break point corresponds to that of the groove of the cover layer, i.e., the ideal break points in the support and cover layer overlap one another.
  • All the known covering caps have the drawback that the opening and tearing force cannot be changed without changing the optical and/or mechanical properties of the covering cap. If the groove is indented for example to reduce the tear-open force, then the risk of further tearing at the ends is increased.
  • the object of the invention is to, in the case of an airbag covering cap having a smooth cover surface layer, allow the cap to tear open at a lower force without the cap continuing to tear further over the end of the proposed break line, and to change the opening and further tearing force without changing the optical and/or mechanical properties.
  • the airbag covering cap of the present invention includes a support and a cover layer of different elasticity with at least a tear-off line along which the airbag covering cap tears open as the airbag is deployed, wherein the cover layer is weakened in the area of the tear-off line through groove and the support layer extends into this groove, and wherein the cover layer has, adjoining the section of the support layer which extends into the groove, a section which extends into the support layer, whereby the edge between the sections of the cover layer and support layer each extend into the other layer, forming a tear-off edge.
  • both the support layer and the cover layer have a reinforced section in the area of the break point. Between these two sections stretches a tear-off edge running through both layers, i.e., this tear-off edge is, seen in cross-section, substantially longer than with the known covering caps.
  • the covering cap in the event of a crash, tears open along this tear-off edge starting from the weakened lines above the groove in the cover layer, whereby the adhesion between the material of the support and the cover layer is slight along the tear-off edge.
  • the reinforced sections and the extended tear-off edge on the one hand prevent the airbag covering cap from tearing open further at the end of the groove of the cover layer and on the other hand ensures in addition that the airbag covering cap tears open along the proposed line.
  • the support layer is designed weaker in the area of the tear-off edge between the sections of the support and covering layers compared to the remaining areas and the cover layer extends into the weakened area.
  • both the cover layer and the support layer are formed continuous in the area of the tear-off edge. The airbag cover tears open in the event of a crash both at the weakened points of the cover layer and of the support layer and along the tear-off edge between the two layers.
  • the support layer has in the area of the tear-off edge between the sections of the support and cover layers at least one slit and that the cover layer extends at least partially into the slit.
  • the support layer is formed non-continuous in the area of the tear-off edge.
  • a slit is likewise provided which is however bridged by thin narrow webs.
  • the webs preferably have a width of 0.8 mm maximum and are arranged at intervals of at least 10 mm.
  • the thickness of the cover layer above the section of the support layer extending into the cover layer preferably increases towards the ends of the tear-off areas whereby further tearing of the cover cap can be affected.
  • the edge of the slit in the support layer is reinforced like a bead.
  • a reinforcement of this kind is likewise possible with the first embodiment at the edges of the weakened area in the support layer. It is thereby further ensured that the airbag cover does not tear open apart from the proposed tear-open areas.
  • the tear-off edge runs inclined relative to the surface of the cover layer and the support layer in this area. By changing the inclined path and the path of the tear-off edge in cross-section it is possible to adjust the initial tearing and further tearing forces without changing the optical or mechanical properties.
  • the tear-off edge preferably runs straight in cross-section but can also run angled in a straight line or curved.
  • FIG. 1 is a view of the underneath of a covering cap
  • FIG. 2 is a sectional view through the covering cap along line A—A of FIG. 1;
  • FIG. 7 shows a view from below of the detail of FIG. 6 with a continuous web
  • FIG. 8 shows a view from below of the detail of FIG. 6 with several narrow webs.
  • the covering cap 1 shown in FIG. 1, tears open into two parts in the event of a crash.
  • two folding areas 2 , 3 are provided which have in the center of the covering cap a common tear-off area 4 .
  • tear-off areas 5 , 6 and 7 , 8 which open into hinge-like sections 9 , 10 which are designed, in a known way, for example, as film hinges and are not shown in detail.
  • the covering cap has a support layer 11 with an edge 12 and that a cover layer 13 is provided over the support layer 11 .
  • Both preferably consist of plastic whereby the material of the cover layer is softer than the material of the support layer.
  • the cover layer 13 has a continuous surface while it is designed on the underneath in the manner according to the invention.
  • the cover layer has in the tear-off areas 4 - 8 , a groove into which a section 11 a of the support layer extends.
  • the support layer has in the tear-off areas 4 - 8 , a slit, i.e., the folding areas 2 , 3 are separated from each other in the support layer.
  • a section 13 a of the cover layer 13 extends into this slit.
  • a tear-off edge 14 runs between the two sections 11 a and 13 a . In the present embodiment, this tear-off edge runs in a straight line in cross-section and extends practically through the entire support and cover layers.
  • the support and cover layers receive increased strength in the area of this tear-off edge 14 through the reinforced sections 11 a and 13 a so that further tearing at the ends of the tear-off areas 5 - 8 which adjoin the hinge-like sections 9 , 10 is prevented. Furthermore by changing the incline of the tear-off edge 14 it is possible to affect the force required for initially tearing and further tearing the cover cap without changing the optical and mechanical properties of the tear-off area, i.e., both the continuous surface of the cover layer 13 and also the reinforced sections 11 a and 13 a remain.
  • the thickness, d, of the cover layer 13 above the section 11 a preferably amounts to a few tenths of a millimeter and at the ends of the tear-off areas 5 - 8 to about one millimeter.
  • the support layer 11 and the cover layer 13 expand differently as a result of unequal elasticity.
  • the cover material tears in over the reinforced section 11 a of the support layer 11 and becomes detached from the support material along the inclined tear-off edge 14 .
  • the adhesion between the support and cover layers is, however, so great on the other side that the two layers remain joined together during tearing of the covering cap in the remaining areas so that the covering cap tears open completely.
  • this tear-off edge 15 runs straight with angles, i.e., it has two sections which run at different angles relative to the surface of the covering cap.
  • FIG. 5 A modification of the embodiment of FIG. 4 is shown in FIG. 5 .
  • the support layer has in the area of the tear-off edge 15 bead-like reinforcements 16 , 17 .
  • FIG. 6 the two embodiments of FIGS. 7 and 8 are shown in cross-section.
  • the support layer 11 has no slit in the area of the tear-off edge but a weakening in the material so that a web 18 remains.
  • the weakening has been provided on both sides.
  • the weakened section 13 a of the cover layer 13 extends into the weakened area of the support layer up to the web 18 .
  • the web has such a width that despite the different elasticities of the support and cover layer it tears open together with the cover layer above the reinforced section 11 a.
  • the support layer 11 has a slit which is bridged by webs 19 which extend from one side of the support layer 11 to the other side.
  • the reinforced section 13 a can thus be seen in FIG. 8 between the webs 19 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)
US09/403,471 1997-04-28 1998-03-13 Airbag covering cap comprising a support layer and a cover layer of different elasticities Expired - Fee Related US6505850B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19718931A DE19718931C1 (de) 1997-04-28 1997-04-28 Airbagabdeckkappe aus Träger- und Deckschicht unterschiedlicher Elastizität
DE19718931 1997-04-28
DE19718931.8 1997-04-28
PCT/DE1998/000808 WO1998049033A1 (fr) 1997-04-28 1998-03-13 Element de recouvrement d'airbag constitue d'une couche de support et d'une couche de recouvrement presentant des elasticites differentes

Publications (2)

Publication Number Publication Date
US20020024199A1 US20020024199A1 (en) 2002-02-28
US6505850B2 true US6505850B2 (en) 2003-01-14

Family

ID=7828664

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/403,471 Expired - Fee Related US6505850B2 (en) 1997-04-28 1998-03-13 Airbag covering cap comprising a support layer and a cover layer of different elasticities

Country Status (7)

Country Link
US (1) US6505850B2 (fr)
EP (1) EP0979185B1 (fr)
JP (1) JP2000512953A (fr)
BR (1) BR9809324A (fr)
DE (1) DE19718931C1 (fr)
ES (1) ES2179502T3 (fr)
WO (1) WO1998049033A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050080605A1 (en) * 2003-10-10 2005-04-14 Kong Byung Seok Method for designing passenger air bag door for invisible airbag
US20060061070A1 (en) * 2004-09-21 2006-03-23 Takata Restraint Systems, Inc. Airbag module cover
US20060267314A1 (en) * 2005-05-31 2006-11-30 Sanko Gosei Kabushiki Kaisha Airbag apparatus for vehicle and airbag cover
US20070013172A1 (en) * 2005-07-14 2007-01-18 Lear Corporation A trim panel and a method of manufacture
US20080106076A1 (en) * 2006-11-07 2008-05-08 Terry Sella Airbag cover tear seam
US20090218793A1 (en) * 2006-08-23 2009-09-03 Takata-Petri Ag Airbag cover
US20100194082A1 (en) * 2009-01-30 2010-08-05 Toyoda Gosei Co., Ltd. Front passenger seat airbag apparatus
US20110272929A1 (en) * 2008-09-04 2011-11-10 Osamu Fukawatase Knee airbag device for vehicle

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023646A1 (de) * 2000-05-13 2001-11-15 Bayerische Motoren Werke Ag Abdeckung für den Beifahrer-Airbag eines Personenkraftwagens
US20040056382A1 (en) * 2002-09-19 2004-03-25 Shaner Kenneth W. Method of molding a vehicle trim component
ATE399633T1 (de) * 2003-09-25 2008-07-15 Antolin Grupo Ing Sa Verfahren zum einbringen einer schwächungslinie in eine airbagabdeckung mittels eines ultraschallhorns
DE602004014574D1 (de) * 2003-09-30 2008-08-07 Nihon Plast Co Ltd Gassackabdeckung und Herstellungsverfahren dafür
JP2006290305A (ja) * 2005-04-14 2006-10-26 Nippon Plast Co Ltd 自動車用内装パネル
JP4861682B2 (ja) * 2005-11-08 2012-01-25 日本プラスト株式会社 インストルメントパネル
DE102008011519A1 (de) * 2008-02-25 2009-09-03 Faurecia Innenraum Systeme Gmbh Innenverkleidungsteil
DE102009048893B4 (de) * 2009-10-09 2013-09-12 Lisa Dräxlmaier GmbH Airbagabdeckung
US8783711B2 (en) * 2012-12-17 2014-07-22 Chrysler Group Llc Low mass passenger airbag design
JP6245905B2 (ja) * 2013-09-12 2017-12-13 ダイキョーニシカワ株式会社 エアバッグドア部を有する車両用内装品
DE102014103501A1 (de) 2014-03-14 2015-09-17 Euwe Eugen Wexler Gmbh Verfahren zur Herstellung eines Kunststoffbauteils mittels eines Spritzgießprozesses
JP6254479B2 (ja) * 2014-04-11 2017-12-27 ダイキョーニシカワ株式会社 エアバッグドア部を有する車両用内装品
CN120166972A (zh) * 2022-10-06 2025-06-17 延锋国际汽车技术有限公司 用于车辆内部的部件
DE102024101527A1 (de) * 2024-01-19 2025-07-24 Dalphi Metal Espana Slu Modulkappe für ein gassackmodul

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US3756617A (en) * 1969-09-15 1973-09-04 Eaton Corp Safety apparatus
JPH02303949A (ja) * 1989-05-17 1990-12-17 Nippon Plast Co Ltd エアバックのカバー体
US4989896A (en) * 1988-10-17 1991-02-05 Tip Engineering Group, Inc. Double door closure for an air bag deployment opening
EP0428935A2 (fr) 1989-11-06 1991-05-29 Tip Engineering Group, Inc. Aménagement pour fournir une ouverture de déploiement d'un coussin gonflable
EP0487753A1 (fr) 1990-06-20 1992-06-03 Takata Corporation Couvercle modulaire pour dispositif de coussinet pneumatique de securite
JPH05294196A (ja) * 1991-10-18 1993-11-09 Nippon Plast Co Ltd エアバッグ収納カバー体
JPH0651024A (ja) 1992-07-31 1994-02-25 Nec Corp テスト回路
GB2270884A (en) 1992-09-29 1994-03-30 Autoliv Dev Vehicle air bag cover
US5316822A (en) * 1991-07-23 1994-05-31 Nihon Plast Co., Ltd. Cover for vehicular air bag
US5335935A (en) * 1992-08-31 1994-08-09 Plastic Mold Technology Incorporated Air bag cover/molded article with integral cover layer of leather
DE4424686A1 (de) 1993-07-20 1995-01-26 Klippan Autoliv Snc Airbag-Abdeckung
WO1995024328A1 (fr) 1994-03-10 1995-09-14 Autoliv Development Ab Habillage d'un air-bag
US5501890A (en) * 1992-12-04 1996-03-26 Davidson Textron Inc. Invisible tear seam for an air bag deployment opening cover
US5536037A (en) 1994-11-18 1996-07-16 Trw Vehicle Safety Systems Inc. Deployment door for use in a vehicle occupant restraint apparatus
DE19516230A1 (de) 1995-05-03 1996-11-07 Eldra Kunststofftechnik Gmbh Airbag-Abdeckung sowie Verfahren zu seiner Herstellung
US5698283A (en) * 1995-06-21 1997-12-16 Toyoda Gosei Co., Ltd. Air bag cover and manufacturing method for same
US5741025A (en) * 1996-05-22 1998-04-21 Ks Centoco Ltd. Integral steering wheel and air bag assembly
US5779262A (en) * 1995-12-12 1998-07-14 Toyoda Gosei Co., Ltd. Car interior finish member with air bag cover
US5913534A (en) * 1996-07-01 1999-06-22 Takata (Europe) Vehicle Safety Technology Gmbh Airbag module cover cap
US5957483A (en) * 1996-12-21 1999-09-28 Trw Automotive Safety Systems Gmbh Covering for an airbag module
US5979931A (en) * 1995-12-12 1999-11-09 Toyoda Gosei Co., Ltd. Air bag cover
US5997030A (en) * 1997-03-19 1999-12-07 Lear Automotive Dearborn, Inc. Vehicle instrument panel with seamless airbag cover

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756617A (en) * 1969-09-15 1973-09-04 Eaton Corp Safety apparatus
US4989896A (en) * 1988-10-17 1991-02-05 Tip Engineering Group, Inc. Double door closure for an air bag deployment opening
JPH02303949A (ja) * 1989-05-17 1990-12-17 Nippon Plast Co Ltd エアバックのカバー体
EP0428935A2 (fr) 1989-11-06 1991-05-29 Tip Engineering Group, Inc. Aménagement pour fournir une ouverture de déploiement d'un coussin gonflable
EP0487753A1 (fr) 1990-06-20 1992-06-03 Takata Corporation Couvercle modulaire pour dispositif de coussinet pneumatique de securite
US5316822A (en) * 1991-07-23 1994-05-31 Nihon Plast Co., Ltd. Cover for vehicular air bag
JPH05294196A (ja) * 1991-10-18 1993-11-09 Nippon Plast Co Ltd エアバッグ収納カバー体
JPH0651024A (ja) 1992-07-31 1994-02-25 Nec Corp テスト回路
US5335935A (en) * 1992-08-31 1994-08-09 Plastic Mold Technology Incorporated Air bag cover/molded article with integral cover layer of leather
GB2270884A (en) 1992-09-29 1994-03-30 Autoliv Dev Vehicle air bag cover
US5501890A (en) * 1992-12-04 1996-03-26 Davidson Textron Inc. Invisible tear seam for an air bag deployment opening cover
DE4424686A1 (de) 1993-07-20 1995-01-26 Klippan Autoliv Snc Airbag-Abdeckung
WO1995024328A1 (fr) 1994-03-10 1995-09-14 Autoliv Development Ab Habillage d'un air-bag
US5772240A (en) * 1994-03-10 1998-06-30 Autoliv Development Ab Air-bag arrangement
US5536037A (en) 1994-11-18 1996-07-16 Trw Vehicle Safety Systems Inc. Deployment door for use in a vehicle occupant restraint apparatus
DE19516230A1 (de) 1995-05-03 1996-11-07 Eldra Kunststofftechnik Gmbh Airbag-Abdeckung sowie Verfahren zu seiner Herstellung
US5698283A (en) * 1995-06-21 1997-12-16 Toyoda Gosei Co., Ltd. Air bag cover and manufacturing method for same
US5779262A (en) * 1995-12-12 1998-07-14 Toyoda Gosei Co., Ltd. Car interior finish member with air bag cover
US5979931A (en) * 1995-12-12 1999-11-09 Toyoda Gosei Co., Ltd. Air bag cover
US5741025A (en) * 1996-05-22 1998-04-21 Ks Centoco Ltd. Integral steering wheel and air bag assembly
US5913534A (en) * 1996-07-01 1999-06-22 Takata (Europe) Vehicle Safety Technology Gmbh Airbag module cover cap
US5957483A (en) * 1996-12-21 1999-09-28 Trw Automotive Safety Systems Gmbh Covering for an airbag module
US5997030A (en) * 1997-03-19 1999-12-07 Lear Automotive Dearborn, Inc. Vehicle instrument panel with seamless airbag cover

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7328140B2 (en) * 2003-10-10 2008-02-05 Hyundai Motor Company Method for designing passenger air bag door for invisible airbag
US20050080605A1 (en) * 2003-10-10 2005-04-14 Kong Byung Seok Method for designing passenger air bag door for invisible airbag
US7780186B2 (en) 2004-09-21 2010-08-24 Tk Holdings Inc. Airbag module cover
US20060061070A1 (en) * 2004-09-21 2006-03-23 Takata Restraint Systems, Inc. Airbag module cover
US8091919B2 (en) 2004-09-21 2012-01-10 Tk Holdings Inc. Airbag module cover
US20110018242A1 (en) * 2004-09-21 2011-01-27 Tk Holdings Inc. Airbag module cover
US20060267314A1 (en) * 2005-05-31 2006-11-30 Sanko Gosei Kabushiki Kaisha Airbag apparatus for vehicle and airbag cover
US20070013172A1 (en) * 2005-07-14 2007-01-18 Lear Corporation A trim panel and a method of manufacture
US7384061B2 (en) * 2005-07-14 2008-06-10 International Automotive Components Group North America, Inc. Trim panel and a method of manufacture
US8047561B2 (en) 2006-08-23 2011-11-01 Takata-Petri Ag Airbag cover
US20090218793A1 (en) * 2006-08-23 2009-09-03 Takata-Petri Ag Airbag cover
US7748732B2 (en) 2006-11-07 2010-07-06 Autoliv Asp, Inc. Airbag cover tear seam
US20080106076A1 (en) * 2006-11-07 2008-05-08 Terry Sella Airbag cover tear seam
US20110272929A1 (en) * 2008-09-04 2011-11-10 Osamu Fukawatase Knee airbag device for vehicle
US8408589B2 (en) * 2008-09-04 2013-04-02 Toyota Jidosha Kabushika Kaisha Knee airbag device for vehicle
US20100194082A1 (en) * 2009-01-30 2010-08-05 Toyoda Gosei Co., Ltd. Front passenger seat airbag apparatus
US8100431B2 (en) * 2009-01-30 2012-01-24 Toyoda Gosei Co., Ltd. Front passenger seat airbag apparatus

Also Published As

Publication number Publication date
DE19718931C1 (de) 1998-08-06
US20020024199A1 (en) 2002-02-28
EP0979185B1 (fr) 2002-06-19
WO1998049033A1 (fr) 1998-11-05
BR9809324A (pt) 2000-07-04
JP2000512953A (ja) 2000-10-03
EP0979185A1 (fr) 2000-02-16
ES2179502T3 (es) 2003-01-16

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Effective date: 20070114